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<!DOCTYPE html> <html> <script src="/lib/angular-1.4.8.min.js"></script> <body ng-app=""> <input ng-focus="count = count + 1" ng-init="count=0" /> <h1>{{count}}</h1> <p>This example will increase the value of the variable "count" every time the input field gets focus.</p> </body> </html>